Title :
Investigation of Q-Switching Characteristics in Single- and Double-Spacing Multi-Wavelength Brillouin Erbium Fiber Laser
Author :
Tan, S.J. ; Jusoh, Z. ; Ali, Norsabilillah Mohd ; Arof, Hamzah ; Ahmad, Harith ; Harun, Sulaiman Wadi
Author_Institution :
Dept. of Electr. Eng., Univ. of Malaya, Kuala Lumpur, Malaysia
Abstract :
A multi-wavelength Brillouin erbium fiber laser (BEFL) with a Q-switching characteristic is demonstrated using a piece of non-zero dispersion shifted fiber (NZ-DSF) as a Brillouin gain medium (BGM) in conjunction with relaxation oscillation technique. The performance of the multi-wavelength short pulse generation is investigated for two different BEFL configurations for single and double Brillouin spacing outputs. The Q-switched BEFL generates a pulse train with repetition rates of 10.36 and 20.41 kHz whose corresponding pulse widths are 13.21 and 3.84 μs for the single and double Brillouin spacing outputs, respectively. The self-starting pulses are obtained within a low 1480-nm pump power region at a slightly higher power than the lasing threshold power. This pulse laser based on stimulated Brillouin scattering (SBS) is fairly stable at room temperature.
Keywords :
Q-switching; fibre lasers; optical fibre dispersion; optical pulse generation; optical pumping; stimulated Brillouin scattering; BEFL; BGM; Brillouin gain medium; Brillouin spacing; NZ-DSF; Q-switching; double-spacing multiwavelength Brillouin erbium fiber laser; frequency 10.36 kHz; frequency 20.41 kHz; lasing threshold power; multiwavelength short pulse generation; nonzero dispersion shifted fiber; pump power region; relaxation oscillation; self-starting pulses; single-spacing fiber laser; stimulated Brillouin scattering; temperature 293 K to 298 K; Cavity resonators; Erbium-doped fiber lasers; Gain; Laser excitation; Optical fiber dispersion; Pump lasers; Scattering; Q-switching; multi-wavelength laser; stimulated Brillouin scattering (SBS);
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2013.2269675
